Tube-cutter.



No. 881,358. Y 'JPATEMED.1m/.1Rl 1o. 190s.

. o. THOMAS. & G. BLAGKWBLL.

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OMER THOMAS'AND GRANT BLACKWELL, OF BEDFORD, INDIANA.

TUBE-CUTTER.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed August 9, 1907. Serial No. 387,917.

1 To all whom it may concern:

Be it known that we, OMER THOMAS and GRANT BLAoKwELL, citizens of the United States, residing at Bedford, in the county of Lawrence and State of Indiana, have invented certain new and useful Improvements in Tube-Cutters, of which the following is a speciiication, reference being had therein to the accompanying drawing.

This invention relates to an improvement in tube cutters, and more particularly to that class of tube cutters known as inside cutters, in which the implement is introduced into the tube and upon rotation thereof the cutter is forced outwardly into engagement with the wall of the tube.

The object of the present invention is the provision in a device of this character, of means permitting the cutter to be instantaneously restored to its normal position after the tube has been cut, so that the implement may be quickly and readily withdrawn from the tube.

A further object of the invention is the provision in a device of this character, of

. means whereby the tube may be cut at any desired distance from the end thereof.

Other objects of the invention will be apparent from the detailed description hereinafter, when read in connection with the accompanying drawings forming a part hereof, wherein a preferable embodiment of our invention is shown, and wherein like characters of reference refer to similar parts in the several views.

In the drawings: Figure 1 is a side elevation of our improved tube cutter. Fig. 2 is a longitudinal section. Figs. 3 4 and 5 are cross sections on lines 8-3, 4 4, and 5-5 of Fig. 2, and Fig. 6 is a detail view.

Referring now more particularly to the drawings, A designates a base plate to the forward end of which is removably secured, in any suitable manner, the upwardly extending plate B which is provided with an opening b therein, in which is threaded or otherwise secured a sleeve b', which is adapted to support the end of the pipe which is to be out, as will be hereinafter more particularly set forth. Rotatably mounted in the opening b in' the plate B is the cutter carrying member C, said member comprising a substantially cylindrical member c which passes through the sleeve b and projects therebeyond, and an enlarged cylindrical portion c', which is connected to said reduced portion by a shoulder which abuts against the inner face of the plate B and prevents longitudinal movement ofthe tool carrying member therethrough. The tool carrying member C is provided with a squared opening c2 extending longitudinally thereof, and

the reduced cylindrical portion c of said member is provided with an elongated slot c3 therein, which extends inwardly from the outer surface thereof to the opening c2 extending axially thereof.

D designates an arm, which is of a size tojll the slot c3 in the reduced cylindrical portion c, and which is pivotally mounted therein by a pin d, which passes through alined openings in said cylindrical portion lc and in the forward end of said arm, Journaled in the rear end of said arm is a cutting disk d which may be of any suitable construction. Positioned in the opening c2 extending axially of the reduced cylindrical portion c is a coil spring d2, the u per' end of which contacts Vwith the forwar end of the arm D and normally serves to hold the rearward end of said arm depressed so that the cutter d carried thereby will not project above the surface of the sleeve b hereinbefore referred to.

E designates a clamping plate which is removably secured to the forward end of the base plate A by screws e e, and which is provided with an opening e therein in axial alinement with the opening b in the plate B secured to the rear end of said base late. The upper portion of the plate E is sp 't to form se arated ears c2 e2 which are provided with alined threaded apertures designed to be engaged by a suitable screw e3.

F designates an elongated sleeve which is adapted to be clamped within the opening e in the plate E and the rear end of which projects slightly beyond the rear surface of said plate and terminates 'in a shoulder f. The sleeve F is provided between the shoulder f thereof and the rear surface of the clamping plate E with slots or cut away portions at each side thereof.

G esignates an actuating shaft or rod the rear end of which is threaded for a considerable distance and the forward end of which is squared so as to engage the squared opening c2 extending axially of the member C. The extreme forward portion of the rod or shaft G is provided with a wedge-shaped portion g, so that when said rod is moved forwardly into the member O, the forward edge of said wedge willpass under the rear end of the arm D,.which is slightly cutaway to (permit the passagev ofthe wedge therev un er7 and upon further forward movement of said rod or shaft, the rear end of said arm. will be elevated and the cutter d carriedw therebywill be-forced into engagement withk the wall of the tube which is to be cut. Positioned between the collar f of the sleeve F and the inner surface of the clamping plate Eisa nutH, whi'ch is adapted to im'- part :theH necessary longitudinal lmovement tothe shaft'or-rod-G when the samey is'ro` tate'd. The nut-H comprises two vportions h "k '-whichfare pivotally vmounted at'their lower ends-:in any suitablemanner u on therear faceof the clamping-'plate Efan -which are provided with complementarythreaded segmental-portions h', whi'ch'are designedto project through the slots' orv cut-away portions f," at each side of the= sleeve .Ffandto engagev the"- threaded portions of theractuating shaft or roel Gf whenlthe parts 7L 7L are" Y drawn together,l as will be hereinafter set forthp The -portions 7L 7L terminate -at their upper-endsin ears h2 71,2 which are provided with 'foppositely threaded alined openings therein which are designed to be engaged by oppositely threaded yportions of a bolt I, one end ofwhich-v-is provided with'a suitable f operating handle t.

Kf^designatesa colla'rwhich is mounted on the-inner end Yofthe shaft-'or 'rod Gr andwhiichl'is designedto beadjustably secured in any `suitableman-ner in any 'desired 'posi-i tionthereon-,said collarservmg to limit'they longitudinalmovement ofthe rod or shaft Gi' andaconsequently the -depth vof .cut of the implement;

The reducedportion c ofthe member C terminates at its forwardend'in a suitable spindle u on which isloosely mounted a collarf, which collar 4is identical'in size-With the collarrb 'carried by the-plate B heretofore re-` fefrredv to andl serves together with the` collar bffas the-means for supporting the pipesto to be cut and properly positioning thecutter with reference thereto.L

In theuseof our-improved -tube cutter, the f the-'threaded yportionof the shaft or rodrG.

The-shaft'orrod Gis then rotated by means of -a suitablehandle secured' to the rearend thereof orby other suitable means,and suchA rotation causesthe -forward endof-said rod orshaft' to move forwardly into the opening c2^whicheXtends axially of the member C' and willalso7 owing -to the s uared shape of= Said vopening-and of the portion of the shaft which engages the same, cause the member C to be rotated'. Y The rotation of the rod or shaft D is continued until the tube has been fullylsevered or cut to the desired depth, at which time the handle of the bolt l is manipulated to mo-ve the portions 7L 71 of the .nutll so as to throw the threaded portions thereof out of engagement with the threaded portion of the shaft or rod G, when suoli shaft may be quickly drawn rearwardly so as to with-` draw the'wedge-shaped portion thereof from under the forward end of the arm G and permit the spring d to restore saidl arm to its normal osition, so that the implement may be-readi y withdrawn from the tube. Ordi; narily the implement is introduced into the tubeun-til 'the end of said tube contacts with l' the forward face of the plate B, 4so that the cutis always made at the same distance from the end of the tube. ln cases, however,t where it is ldesired to make the cuts at various distances from the ends of the tubes, the sleeve b is provided with a collar b2, which constitutes a `stop for the end of the tube which is to be cut, and which may be shifted to'any desired point on the sleeve b and clamped thereon in any suitable manner.

We do not desire to limit ourselves to the precisefform and construction shown in the i drawings, changes may be made thereto without dearting from the spirit of the invention as-defm'ed in the appended claims.

Having thus described the invention, what is claimed is l. In a tube cutter, a relatively fixed supporting member, a member rotatably mounted inV said supporting member, a radially movable cutter carried by saidrotatable member,an 'actuating shaft mounted in saidv supporting member, said actuating shaft being provided with a threaded portion and with a portion which is longitudinally movable in said rotatable member and rotatable therewith,E means for forcing said cutter outwardly. when said shaft is moved longitudi-` nally of-said rotatable member, a sectional nut carried by said supporting member and adapted to engage the threaded portion of said actuating shaft, and means for positively effecting a rapid adjustment of the sections of the nut back and forth.

2. In' a tube cutter, a relatively 'fixed supporting member, a member rotatably mounted in'said supporting member, a radially movable cutter carried by saidrotatable member, an actuating shaft mounted in said supporting member, said actuating shaft beingiprovided with a threaded )ortion and with a portion which is longitudinally movablein said `rotatable member and rotatable therewith, means for `forcing said cutter outwardly when said shaft is moved longitudinally'of-said rotatable member, and a nut carried -by said supporting member comprisas it is obvious that many minor 9 ing sections pivotally connected thereto and provided with complementary threaded portions adapted to engage opposite sides of the threaded portions of said actuating shaft, and means for positively adjusting said sections back and forth.

3. In a tube cutter, a supporting member, a member rotatably mounted in said supporting member, a radially movable cutter carried by said rotatable member, an actuating shaft mounted in said supporting member, said actuating shaft being provided with a threaded portion and with a portion longitudinally movable in said rotatable member and rotatable therewith, means for forcing said cutter outwardly when said actuating shaft is moved longitudinally of said rotatable member, and a nut carried by said supporting member comprising sections pivot ally connected thereto and provided with complementary threaded portions adapted to engage opposite sides of the threaded portions of said actuating shaft, said sections being provided with oppositely threaded alined apertures, and a bolt provided with oppo sitely threaded portions engaging said apertures.

4. In a tube cutter, a supporting member, a plate carried thereby and provided with a sleeve projecting therefrom, a collar adjustably mounted on said sleeve, a tool carrying member journaled in said sleeve and of less diameter than saidV sleeve, a sleeve loosely mounted on the end of said tool-carrying member of substantially the s'ame diameter Y as the iirst mentioned sleeve, a cutter movably secured to said tool carrying member and normally positioned below the peripheries of said sleeves means for forcing said cutter outwardly, and means for rotating said tool carrying member.

5. In a tube cutter, a supporting member provided with a fixed tube supporting sleeve, a tool carrying member rotatably mounted in said sleeve, a cutter carried by said member, and a collar adjustably secured on said sleeve.

6. In a tube cutter, a supporting member, a tool carrying member journaled therein and provided' with an opening extending axially thereof, a radially movable cutter carried by said tool carrying member and provided with a portion extending within the axial opening therein, an elongated sleeve carried by the supporting member provided with oppositely disposed slots therein, a threaded operating shaft positioned within said sleeve the end of said shaft being wedge shaped and proe jecting within the axial opening in the tool carrying member, a nut carried by the supporting member comprising sections pivotally connected therewith and provided with complementary threaded portions adapted to project through theA slots in the elongated sleeve and to engage opposite sides of the threaded operating shaft, and means for adj usting the sections of said nut.

In testimony whereof we aflix our signatures in presence of two witnesses.

OMER THOMAS. GRANT BLACKWELL. 4 Witnesses:

CHAs. WM. GOBAT, WILLIAM R. BEYERs. 

